Fluid compressor regulating valve



Oct. 25, 1932. A. F. PARKS 8 7 mm COMPRESSOR REGULATING VALVE Filed May 24, 1930 IN VE N TOR. -H16erzTZZ ar/Za BY W Y ATTORNEYS.

Patented Oct. 25, 1932 UNITED STATES ALB/ERT FRANKLIN PARKS, or son'rn Application filed May 24,

My; invention relates to regulating yalves suchas are used in connection with air and gas compressors, pumps and apparatus for unloading compressors and whereby they may be controlled automatically by varlations in the receiver pressures.

Theobject of the invention is to provide a regulating and auxiliary valve for use 1n compressor control systems, adapted to be 59 inserted as a unit between the unloader valve and the differential unloader valve to serve as a relay under control for admitting the compressed fluid in volume and at full pressure to the unloading valves and to provide such a valve of simple construction, inexpensive to manufacture, and particularly eflicient in operation.

With these and other objects in view, the of} invention resides and consists in the construc ment of parts hereinafter more fully described, illustrated in the accompanying drawing, and pointed out in the claims hereto appended, it being understood that various changes in the form, proportion, size and minor details of construction within the scope of the claims may be resorted to without departure from the spirit, or sacrificing anyof the advantages of the invention. Y

Similar characters of reference denote like or corresponding parts throughout the several figures of the accompanying drawing forming a part of this specification.

In the accompanying drawing forming a part of this specification, the figure shows a central vertical sectional view of my improved regulating valve connected with a control valve and compressor.

g The regulating valve is formed of three principal members which are threadably connected together to form a body, and in which are arranged all the operative parts including "a relativelyglong valve stem that carries several valves that are preferably arranged in alignment, and includes a main valve that receives the air supply from one side and delivers it to the opposite side. My valve is shown connected with a control valve 23, also 50 shown in section, and which in turn is piped tion and novel combination and arrange-..

PATENT OFFICE NOItWALK, CONNECTICUT, ASSIGNOB TO NORWALK COMPANY, INC., OF'SOUTH NORWALK, CONNECTICUT} A CORPORATION 01" FLUID COMPRESSOR REGULA'IING vALvii 1980. Serial No. 455,183.

to an air compressor 29 as will later be more specifically described.

Of the regulating valve, 5 represents the lower body member, 6 the intermediate casing, and 7 a spring housing. These three valve members are threadably connected to-.

gether to form a single unit, there being an annular thread formed on the opposite cylindrical end portions of the intermediate member 6 to receive the correspondingly inter-,

nally threaded cylindrical portions of the members 5 and 7. 8 represents an inlet for the air supply through which the air passes to the valve ports 9 and outlet 10. 11 repreton 16. This valve is 'slidably mounted upon the valve stem'll and is operated by air pressure in one direction against .the action of a spring 17. The spring is positioned between the shoulder formed by the piston end of the valve and an annular shoulder in themember 6 in away to normally hold the oscillatory valve and its piston ina raised position, as shown in the drawing, and above the vents 1818. The upper end portion of the intermediate member 6 further includes a relatively large cylindrical chamber 19 having an and close the vents 18. The valves 12 carriedby thestem 11 are operated together in one direction to open the dolible-acting valve 12,

while the spring contained within the housing 7 serves to operate the piston 24 to close said valves when the air pressure is released. One end of the spring 25 being positioned upon the piston 24 and the other against a washer 26 positioned in the upper,

This control valve includes a hollow threaded body 30 with which the before mentioned pipes 28 and 22 are connected. A second hollow threaded body member 31 is threadably fitted in the first mentioned body, and this in turn is closed by a cylindrical threaded cap 32. A spool valve member 33 is movably contained within the cylindrical ported chamber 34 of the body 31 and is engaged on its top side by a stem 35 which together with the spring 36 serves to hold the spool down upon its seat 37. When in this position there is a slight opening at 38 above the spool which allows any air to pass out through port 39 to atmosphere. If the pressure rises in the receiver and pipe 28 above that which the spring 36 will counterbalance, then the spool valve will rise, closing the opening 38 and opening the bottom passage 37, permitting air to pass from the receiver through ports 40, and pipe 22, to chamber 19-20 below the piston 24 of the regulating valve, causing the same to operate as above described.

When the pressure in the receiver falls below that for which the spring 36 is set, a reversed motion of the spool valve takes place, dropping down on its lower seat37 and cutting ofi" the supply of air from the receiver 29 to pipe 22 and at the same time again reestablishes the upper passage at 38 allowing the air in pipe 22 and chamber 20 to exhaust to atmosphere.

The operation of the valve is as follows:

A predetermined pressure occurring in the main receiver opens the control valve 23, admits air through the passage 21 to the chamber 19 between the pistons, forcing down the oscillatory valve 15 and thus closing the vents 18, at the same time forcing up the piston 24:, relieving the spring pressure from the top of the double ported valve 12 and allowing pressure from the receiver through the intake port 8 to pass through the double ported valve through the discharge port 10 and into the unloader, not shown, which is to b. operated.

A reduction of the pressure in the main unloading valve will cut off the flow of air through the port 21 to the space 19, at the same time opening valve 23 to atmosphere and allowing any air contained in the space 19 to vent back through said valve to atmosphere. This allows both the oscillatory piston 16 and main piston 24 to assume their normal positions. The return of the oscillatory piston 16 and its valve 15 opens the vents 18 to atmosphere and allows the air supply to thedevices which are operated, to be vented to atmosphere. The return of the piston 24; to its original position again applies the spring pressure to the double ported valve 12 and cuts otl' the supply of air from the intake port 8 to the discharge port 10.

Having thus described my invention, what I claim and desire to secure by Letters Patent 1s:

1. In a valve of the class described, the combination of a casing including an intake, an outlet, and valve seats, a central bore therein and vents connected with the bore, said casing also having cylinders opening into each other and having a common intake, normally spaced apart pistons, one in each cylinder, springs seated upon said pistons, one of the pistons being secured upon the valve stem and the other being slidable thereon, whereby said pistons and the valves are simultaneously operated in opposite directions against the actions of their respectiil le springs to open one valve and close the ot er.

2. In a valve of the class described, the combination of a casing including an intake, an outlet, and valve seats, a central bore therein and vents connected with the bore, said casing also having cylinders opening into each other and having a common intake, normally spaced apart pistons, one in each cylinder, springs seated upon said pistons, one of the pistons being secured upon the valve stem and the other being slidable thereon, whereby said pistons and the valves may be simultaneously operated by air pressure in opposite directions against the actions of their respective springs to open one valve and close the other, a removable housing inclosing one of said springs and means for adjusting the tension of said spring upon its piston.

3. In a valve of the class described, the combination of a casing including an intake, an outlet and valve seats, a valve stem arranged centrally and longitudinally of the said casing, and carrying a double-ported valve to operate in conjunction with said valve seats, a piston cylinder formed in the upper portion of the said casing, an intake port communicating with the lower part of said cylinder, a piston mounted upon the valve stem to operate in the cylinder, a spring seated upon the piston to normally hold it in a closed position, an oscillatory tubular valve member mounted on the valve stem having a piston upon one end, the said piston being po- 'sitioned adjacent to the enlargement of the before mentioned piston chamber, a spring to normally hold this tubular valve and piston in an open position, and vents communicating with the intake side of the valve body and. adapted to be closed by the action of the oscillatory valve against the action of the last mentioned spring when pressure through the intake port is released.

m 4. In a valve of the class described, the

combination of a casing formed of a main body member, an intermediate member and a housing, connected together, the said body including an intake, an outlet and valve seats, a valve stem arranged central of and extended into the three said members and carrying a double-ported valve to operate in conjunction with said seats, a piston cylinder formed in the upper portion of the said intermediate member, an intake port communicating with the lower part of said cylinder, a piston within said cylinder mounted upon the valve stem, a spring seated upon the piston to normally hold it in a lowered position and the valve closed, an oscillatory tubular valve member having a piston upon one end mounted upon said valve stem, the said piston being positioned adjacent to the en largement of the before mentioned piston chamber, a spring to normally hold this tubular valve and piston in an open position, and vents communicating with the intake side of the valve body and adapted to be closed by the action of the oscillatory valve when pressure through the intake port is released.

Signed at South Norwalk in the county of Fairfield and State of Connecticut this 22nd day of May A. D. 1930.

40 ALBERT FRANKLIN PARKS. 

